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I have installed debian 8 jessie via usb stick on my thinkpad x250 (the laptop doesn't have any cd-dvd rom). Now when i want to use the synaptic or install some programms (especifically pure data) via: sudo apt-get install puredata i get this in terminal:

Media change: please insert the disc labeled 'Debian GNU/Linux 8.4.0 Jessie - Official i386 DVD Binary-1 20160402-13:26' in the drive '/media/cdrom/' and press enter

Why this happens and how am i supposed to insert a dvd when i haven't any dvd-rom? How can i fix this?

2 Answers2

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The installer considers that the USB stick you used for installation is a CD or DVD image; it left a reference to it in /etc/apt/sources.list as a source of packages for later.

If you only wish to install packages from the Internet, you can remove the line mentioning cdrom: in /etc/apt/sources.list, then update the package cache with

sudo apt-get update

You could use the USB stick again but that would be somewhat more complicated.

Stephen Kitt
  • 434,908
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You need to modify your /etc/apt/sources.list and comment out the line beginning with deb cdrom:. Use the editor of your choice to add a # directly before deb cdrom: save the file and then run sudo apt-get update.

torchhound
  • 278